diff --git a/include/media/AudioIoDescriptor.h b/include/media/AudioIoDescriptor.h
index c94b738..a4907cc 100644
--- a/include/media/AudioIoDescriptor.h
+++ b/include/media/AudioIoDescriptor.h
@@ -56,13 +56,13 @@
         return AUDIO_PORT_HANDLE_NONE;
     }
 
-    audio_io_handle_t mIoHandle;
-    struct audio_patch mPatch;
-    uint32_t mSamplingRate;
-    audio_format_t mFormat;
-    audio_channel_mask_t mChannelMask;
-    size_t mFrameCount;
-    uint32_t mLatency;
+    audio_io_handle_t       mIoHandle;
+    struct audio_patch      mPatch;
+    uint32_t                mSamplingRate;
+    audio_format_t          mFormat;
+    audio_channel_mask_t    mChannelMask;
+    size_t                  mFrameCount;
+    uint32_t                mLatency;   // only valid for output
 };
 
 
diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h
index 901a0fd..91e2bbd 100644
--- a/include/media/AudioSystem.h
+++ b/include/media/AudioSystem.h
@@ -114,11 +114,12 @@
     // FIXME This API assumes a route, and so should be deprecated.
     static status_t getOutputLatency(uint32_t* latency,
             audio_stream_type_t stream);
-    static status_t getSamplingRate(audio_io_handle_t output,
+    // returns the audio HAL sample rate
+    static status_t getSamplingRate(audio_io_handle_t ioHandle,
                                           uint32_t* samplingRate);
-    // returns the number of frames per audio HAL write buffer. Corresponds to
-    // audio_stream->get_buffer_size()/audio_stream_out_frame_size()
-    static status_t getFrameCount(audio_io_handle_t output,
+    // returns the number of frames per audio HAL buffer. Corresponds to
+    // audio_stream->get_buffer_size()/audio_stream_out/in_frame_size()
+    static status_t getFrameCount(audio_io_handle_t ioHandle,
                                   size_t* frameCount);
     // returns the audio output latency in ms. Corresponds to
     // audio_stream_out->get_latency()
diff --git a/include/media/IAudioFlinger.h b/include/media/IAudioFlinger.h
index e28f79d..0d9bc3b 100644
--- a/include/media/IAudioFlinger.h
+++ b/include/media/IAudioFlinger.h
@@ -97,14 +97,14 @@
                                 sp<IMemory>& buffers,   // return value 0 means it follows cblk
                                 status_t *status) = 0;
 
-    // FIXME Surprisingly, sampleRate/format/frameCount/latency don't work for input handles
+    // FIXME Surprisingly, format/latency don't work for input handles
 
     /* query the audio hardware state. This state never changes,
      * and therefore can be cached.
      */
-    virtual     uint32_t    sampleRate(audio_io_handle_t output) const = 0;
+    virtual     uint32_t    sampleRate(audio_io_handle_t ioHandle) const = 0;
     virtual     audio_format_t format(audio_io_handle_t output) const = 0;
-    virtual     size_t      frameCount(audio_io_handle_t output) const = 0;
+    virtual     size_t      frameCount(audio_io_handle_t ioHandle) const = 0;
 
     // return estimated latency in milliseconds
     virtual     uint32_t    latency(audio_io_handle_t output) const = 0;
diff --git a/media/libmedia/AudioSystem.cpp b/media/libmedia/AudioSystem.cpp
index 1af5660..c55a90b 100644
--- a/media/libmedia/AudioSystem.cpp
+++ b/media/libmedia/AudioSystem.cpp
@@ -264,25 +264,23 @@
     return getSamplingRate(output, samplingRate);
 }
 
-status_t AudioSystem::getSamplingRate(audio_io_handle_t output,
+status_t AudioSystem::getSamplingRate(audio_io_handle_t ioHandle,
                                       uint32_t* samplingRate)
 {
     const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
     if (af == 0) return PERMISSION_DENIED;
-    sp<AudioIoDescriptor> outputDesc = getIoDescriptor(output);
-    if (outputDesc == 0) {
-        ALOGV("getOutputSamplingRate() no output descriptor for output %d in gOutputs", output);
-        *samplingRate = af->sampleRate(output);
+    sp<AudioIoDescriptor> desc = getIoDescriptor(ioHandle);
+    if (desc == 0) {
+        *samplingRate = af->sampleRate(ioHandle);
     } else {
-        ALOGV("getOutputSamplingRate() reading from output desc");
-        *samplingRate = outputDesc->mSamplingRate;
+        *samplingRate = desc->mSamplingRate;
     }
     if (*samplingRate == 0) {
-        ALOGE("AudioSystem::getSamplingRate failed for output %d", output);
+        ALOGE("AudioSystem::getSamplingRate failed for ioHandle %d", ioHandle);
         return BAD_VALUE;
     }
 
-    ALOGV("getSamplingRate() output %d, sampling rate %u", output, *samplingRate);
+    ALOGV("getSamplingRate() ioHandle %d, sampling rate %u", ioHandle, *samplingRate);
 
     return NO_ERROR;
 }
@@ -303,23 +301,23 @@
     return getFrameCount(output, frameCount);
 }
 
-status_t AudioSystem::getFrameCount(audio_io_handle_t output,
+status_t AudioSystem::getFrameCount(audio_io_handle_t ioHandle,
                                     size_t* frameCount)
 {
     const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
     if (af == 0) return PERMISSION_DENIED;
-    sp<AudioIoDescriptor> outputDesc = getIoDescriptor(output);
-    if (outputDesc == 0) {
-        *frameCount = af->frameCount(output);
+    sp<AudioIoDescriptor> desc = getIoDescriptor(ioHandle);
+    if (desc == 0) {
+        *frameCount = af->frameCount(ioHandle);
     } else {
-        *frameCount = outputDesc->mFrameCount;
+        *frameCount = desc->mFrameCount;
     }
     if (*frameCount == 0) {
-        ALOGE("AudioSystem::getFrameCount failed for output %d", output);
+        ALOGE("AudioSystem::getFrameCount failed for ioHandle %d", ioHandle);
         return BAD_VALUE;
     }
 
-    ALOGV("getFrameCount() output %d, frameCount %zu", output, *frameCount);
+    ALOGV("getFrameCount() ioHandle %d, frameCount %zu", ioHandle, *frameCount);
 
     return NO_ERROR;
 }
diff --git a/media/libmedia/IAudioFlinger.cpp b/media/libmedia/IAudioFlinger.cpp
index e1de111..6da4524 100644
--- a/media/libmedia/IAudioFlinger.cpp
+++ b/media/libmedia/IAudioFlinger.cpp
@@ -265,11 +265,11 @@
         return record;
     }
 
-    virtual uint32_t sampleRate(audio_io_handle_t output) const
+    virtual uint32_t sampleRate(audio_io_handle_t ioHandle) const
     {
         Parcel data, reply;
         data.writeInterfaceToken(IAudioFlinger::getInterfaceDescriptor());
-        data.writeInt32((int32_t) output);
+        data.writeInt32((int32_t) ioHandle);
         remote()->transact(SAMPLE_RATE, data, &reply);
         return reply.readInt32();
     }
@@ -283,11 +283,11 @@
         return (audio_format_t) reply.readInt32();
     }
 
-    virtual size_t frameCount(audio_io_handle_t output) const
+    virtual size_t frameCount(audio_io_handle_t ioHandle) const
     {
         Parcel data, reply;
         data.writeInterfaceToken(IAudioFlinger::getInterfaceDescriptor());
-        data.writeInt32((int32_t) output);
+        data.writeInt32((int32_t) ioHandle);
         remote()->transact(FRAME_COUNT, data, &reply);
         return reply.readInt64();
     }
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index ada1580..9397729 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -691,12 +691,12 @@
     return trackHandle;
 }
 
-uint32_t AudioFlinger::sampleRate(audio_io_handle_t output) const
+uint32_t AudioFlinger::sampleRate(audio_io_handle_t ioHandle) const
 {
     Mutex::Autolock _l(mLock);
-    PlaybackThread *thread = checkPlaybackThread_l(output);
+    ThreadBase *thread = checkThread_l(ioHandle);
     if (thread == NULL) {
-        ALOGW("sampleRate() unknown thread %d", output);
+        ALOGW("sampleRate() unknown thread %d", ioHandle);
         return 0;
     }
     return thread->sampleRate();
@@ -713,12 +713,12 @@
     return thread->format();
 }
 
-size_t AudioFlinger::frameCount(audio_io_handle_t output) const
+size_t AudioFlinger::frameCount(audio_io_handle_t ioHandle) const
 {
     Mutex::Autolock _l(mLock);
-    PlaybackThread *thread = checkPlaybackThread_l(output);
+    ThreadBase *thread = checkThread_l(ioHandle);
     if (thread == NULL) {
-        ALOGW("frameCount() unknown thread %d", output);
+        ALOGW("frameCount() unknown thread %d", ioHandle);
         return 0;
     }
     // FIXME currently returns the normal mixer's frame count to avoid confusing legacy callers;
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 858ebbb..273cfe1 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -128,9 +128,9 @@
                                 sp<IMemory>& buffers,
                                 status_t *status /*non-NULL*/);
 
-    virtual     uint32_t    sampleRate(audio_io_handle_t output) const;
+    virtual     uint32_t    sampleRate(audio_io_handle_t ioHandle) const;
     virtual     audio_format_t format(audio_io_handle_t output) const;
-    virtual     size_t      frameCount(audio_io_handle_t output) const;
+    virtual     size_t      frameCount(audio_io_handle_t ioHandle) const;
     virtual     uint32_t    latency(audio_io_handle_t output) const;
 
     virtual     status_t    setMasterVolume(float value);